| 1. | a person or thing that hops. |
| 2. | Informal. a person who travels or moves frequently from one place or situation to another (usually used in combination): a two-week tour designed for energetic city-hoppers. |
| 3. | any of various jumping insects, as grasshoppers or leafhoppers. |
| 4. | Australian. kangaroo. |
| 5. | a funnel-shaped chamber or bin in which loose material, as grain or coal, is stored temporarily, being filled through the top and dispensed through the bottom. |
| 6. | Railroads. hopper car. |
| 7. | U.S. Politics. a box into which a proposed legislative bill is dropped and thereby officially introduced. |
| 8. | one of the pieces at each side of a hopper casement. |
| 9. | in the hopper, Informal. in preparation; about to be realized: Plans for the class reunion are in the hopper. |
| Hopper, Grace Murray 1906-1992. American mathematician and computer programmer. Noted for her development of programming languages, especially COBOL, she is credited with inventing the first compiler. |